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Initial implementation of WebSocket client.
2021-09-07 19:55:05 +02:00
/* Copyright (c) 2013-2021 the Civetweb developers
* Copyright (c) 2004-2013 Sergey Lyubka
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
typedef struct ssl_st SSL;
typedef struct ssl_method_st SSL_METHOD;
typedef struct ssl_ctx_st SSL_CTX;
typedef struct x509_store_ctx_st X509_STORE_CTX;
typedef struct x509_name X509_NAME;
typedef struct asn1_integer ASN1_INTEGER;
typedef struct bignum BIGNUM;
typedef struct ossl_init_settings_st OPENSSL_INIT_SETTINGS;
typedef struct evp_md EVP_MD;
typedef struct x509 X509;
#define SSL_CTRL_OPTIONS (32)
#define SSL_CTRL_CLEAR_OPTIONS (77)
#define SSL_CTRL_SET_ECDH_AUTO (94)
#define OPENSSL_INIT_NO_LOAD_SSL_STRINGS 0x00100000L
#define OPENSSL_INIT_LOAD_SSL_STRINGS 0x00200000L
#define OPENSSL_INIT_LOAD_CRYPTO_STRINGS 0x00000002L
#define SSL_VERIFY_NONE (0)
#define SSL_VERIFY_PEER (1)
#define SSL_VERIFY_FAIL_IF_NO_PEER_CERT (2)
#define SSL_VERIFY_CLIENT_ONCE (4)
#define SSL_OP_ALL (0x80000BFFul)
#define SSL_OP_NO_SSLv2 (0x01000000ul)
#define SSL_OP_NO_SSLv3 (0x02000000ul)
#define SSL_OP_NO_TLSv1 (0x04000000ul)
#define SSL_OP_NO_TLSv1_2 (0x08000000ul)
#define SSL_OP_NO_TLSv1_1 (0x10000000ul)
#define SSL_OP_NO_TLSv1_3 (0x20000000ul)
#define SSL_OP_SINGLE_DH_USE (0x00100000ul)
#define SSL_OP_CIPHER_SERVER_PREFERENCE (0x00400000ul)
#define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (0x00010000ul)
#define SSL_OP_NO_COMPRESSION (0x00020000ul)
#define SSL_OP_NO_RENEGOTIATION (0x40000000ul)
#define SSL_CB_HANDSHAKE_START (0x10)
#define SSL_CB_HANDSHAKE_DONE (0x20)
#define SSL_ERROR_NONE (0)
#define SSL_ERROR_SSL (1)
#define SSL_ERROR_WANT_READ (2)
#define SSL_ERROR_WANT_WRITE (3)
#define SSL_ERROR_WANT_X509_LOOKUP (4)
#define SSL_ERROR_SYSCALL (5) /* see errno */
#define SSL_ERROR_ZERO_RETURN (6)
#define SSL_ERROR_WANT_CONNECT (7)
#define SSL_ERROR_WANT_ACCEPT (8)
#define TLSEXT_TYPE_server_name (0)
#define TLSEXT_NAMETYPE_host_name (0)
#define SSL_TLSEXT_ERR_OK (0)
#define SSL_TLSEXT_ERR_ALERT_WARNING (1)
#define SSL_TLSEXT_ERR_ALERT_FATAL (2)
#define SSL_TLSEXT_ERR_NOACK (3)
#define SSL_SESS_CACHE_BOTH (3)
enum ssl_func_category {
TLS_Mandatory, /* required for HTTPS */
TLS_ALPN, /* required for Application Layer Protocol Negotiation */
TLS_END_OF_LIST
};
/* Check if all TLS functions/features are available */
static int tls_feature_missing[TLS_END_OF_LIST] = {0};
struct ssl_func {
const char *name; /* SSL function name */
enum ssl_func_category required; /* Mandatory or optional */
void (*ptr)(void); /* Function pointer */
};
#if (defined(OPENSSL_API_1_1) || defined(OPENSSL_API_3_0)) \
&& !defined(NO_SSL_DL)
#define SSL_free (*(void (*)(SSL *))ssl_sw[0].ptr)
#define SSL_accept (*(int (*)(SSL *))ssl_sw[1].ptr)
#define SSL_connect (*(int (*)(SSL *))ssl_sw[2].ptr)
#define SSL_read (*(int (*)(SSL *, void *, int))ssl_sw[3].ptr)
#define SSL_write (*(int (*)(SSL *, const void *, int))ssl_sw[4].ptr)
#define SSL_get_error (*(int (*)(SSL *, int))ssl_sw[5].ptr)
#define SSL_set_fd (*(int (*)(SSL *, SOCKET))ssl_sw[6].ptr)
#define SSL_new (*(SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
#define SSL_CTX_new (*(SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
#define TLS_server_method (*(SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
#define OPENSSL_init_ssl \
(*(int (*)(uint64_t opts, \
const OPENSSL_INIT_SETTINGS *settings))ssl_sw[10] \
.ptr)
#define SSL_CTX_use_PrivateKey_file \
(*(int (*)(SSL_CTX *, const char *, int))ssl_sw[11].ptr)
#define SSL_CTX_use_certificate_file \
(*(int (*)(SSL_CTX *, const char *, int))ssl_sw[12].ptr)
#define SSL_CTX_set_default_passwd_cb \
(*(void (*)(SSL_CTX *, mg_callback_t))ssl_sw[13].ptr)
#define SSL_CTX_free (*(void (*)(SSL_CTX *))ssl_sw[14].ptr)
#define SSL_CTX_use_certificate_chain_file \
(*(int (*)(SSL_CTX *, const char *))ssl_sw[15].ptr)
#define TLS_client_method (*(SSL_METHOD * (*)(void)) ssl_sw[16].ptr)
#define SSL_pending (*(int (*)(SSL *))ssl_sw[17].ptr)
#define SSL_CTX_set_verify \
(*(void (*)(SSL_CTX *, \
int, \
int (*verify_callback)(int, X509_STORE_CTX *)))ssl_sw[18] \
.ptr)
#define SSL_shutdown (*(int (*)(SSL *))ssl_sw[19].ptr)
#define SSL_CTX_load_verify_locations \
(*(int (*)(SSL_CTX *, const char *, const char *))ssl_sw[20].ptr)
#define SSL_CTX_set_default_verify_paths (*(int (*)(SSL_CTX *))ssl_sw[21].ptr)
#define SSL_CTX_set_verify_depth (*(void (*)(SSL_CTX *, int))ssl_sw[22].ptr)
#define SSL_get_peer_certificate (*(X509 * (*)(SSL *)) ssl_sw[23].ptr)
#define SSL_get_version (*(const char *(*)(SSL *))ssl_sw[24].ptr)
#define SSL_get_current_cipher (*(SSL_CIPHER * (*)(SSL *)) ssl_sw[25].ptr)
#define SSL_CIPHER_get_name \
(*(const char *(*)(const SSL_CIPHER *))ssl_sw[26].ptr)
#define SSL_CTX_check_private_key (*(int (*)(SSL_CTX *))ssl_sw[27].ptr)
#define SSL_CTX_set_session_id_context \
(*(int (*)(SSL_CTX *, const unsigned char *, unsigned int))ssl_sw[28].ptr)
#define SSL_CTX_ctrl (*(long (*)(SSL_CTX *, int, long, void *))ssl_sw[29].ptr)
#define SSL_CTX_set_cipher_list \
(*(int (*)(SSL_CTX *, const char *))ssl_sw[30].ptr)
#define SSL_CTX_set_options \
(*(unsigned long (*)(SSL_CTX *, unsigned long))ssl_sw[31].ptr)
#define SSL_CTX_set_info_callback \
(*(void (*)(SSL_CTX * ctx, void (*callback)(const SSL *, int, int))) \
ssl_sw[32] \
.ptr)
#define SSL_get_ex_data (*(char *(*)(const SSL *, int))ssl_sw[33].ptr)
#define SSL_set_ex_data (*(void (*)(SSL *, int, char *))ssl_sw[34].ptr)
#define SSL_CTX_callback_ctrl \
(*(long (*)(SSL_CTX *, int, void (*)(void)))ssl_sw[35].ptr)
#define SSL_get_servername \
(*(const char *(*)(const SSL *, int type))ssl_sw[36].ptr)
#define SSL_set_SSL_CTX (*(SSL_CTX * (*)(SSL *, SSL_CTX *)) ssl_sw[37].ptr)
#define SSL_ctrl (*(long (*)(SSL *, int, long, void *))ssl_sw[38].ptr)
#define SSL_CTX_set_alpn_protos \
(*(int (*)(SSL_CTX *, const unsigned char *, unsigned))ssl_sw[39].ptr)
typedef int (*tSSL_alpn_select_cb)(SSL *ssl,
const unsigned char **out,
unsigned char *outlen,
const unsigned char *in,
unsigned int inlen,
void *arg);
#define SSL_CTX_set_alpn_select_cb \
(*(void (*)(SSL_CTX *, tSSL_alpn_select_cb, void *))ssl_sw[40].ptr)
typedef int (*tSSL_next_protos_advertised_cb)(SSL *ssl,
const unsigned char **out,
unsigned int *outlen,
void *arg);
#define SSL_CTX_set_next_protos_advertised_cb \
(*(void (*)(SSL_CTX *, tSSL_next_protos_advertised_cb, void *))ssl_sw[41] \
.ptr)
#define SSL_CTX_set_timeout (*(long (*)(SSL_CTX *, long))ssl_sw[42].ptr)
#define SSL_CTX_clear_options(ctx, op) \
SSL_CTX_ctrl((ctx), SSL_CTRL_CLEAR_OPTIONS, (op), NULL)
#define SSL_CTX_set_ecdh_auto(ctx, onoff) \
SSL_CTX_ctrl(ctx, SSL_CTRL_SET_ECDH_AUTO, onoff, NULL)
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB 53
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG 54
#define SSL_CTRL_SET_TLSEXT_HOSTNAME 55
#define SSL_CTX_set_tlsext_servername_callback(ctx, cb) \
SSL_CTX_callback_ctrl(ctx, \
SSL_CTRL_SET_TLSEXT_SERVERNAME_CB, \
(void (*)(void))cb)
#define SSL_set_tlsext_host_name(ctx, arg) \
SSL_ctrl(ctx, SSL_CTRL_SET_TLSEXT_HOSTNAME, 0, (void *)arg)
#define X509_get_notBefore(x) ((x)->cert_info->validity->notBefore)
#define X509_get_notAfter(x) ((x)->cert_info->validity->notAfter)
#define SSL_set_app_data(s, arg) (SSL_set_ex_data(s, 0, (char *)arg))
#define SSL_get_app_data(s) (SSL_get_ex_data(s, 0))
#define SSL_CTX_sess_set_cache_size(ctx, size) SSL_CTX_ctrl(ctx, 42, size, NULL)
#define SSL_CTX_set_session_cache_mode(ctx, mode) \
SSL_CTX_ctrl(ctx, 44, mode, NULL)
#define ERR_get_error (*(unsigned long (*)(void))crypto_sw[0].ptr)
#define ERR_error_string (*(char *(*)(unsigned long, char *))crypto_sw[1].ptr)
#define CONF_modules_unload (*(void (*)(int))crypto_sw[2].ptr)
#define X509_free (*(void (*)(X509 *))crypto_sw[3].ptr)
#define X509_get_subject_name (*(X509_NAME * (*)(X509 *)) crypto_sw[4].ptr)
#define X509_get_issuer_name (*(X509_NAME * (*)(X509 *)) crypto_sw[5].ptr)
#define X509_NAME_oneline \
(*(char *(*)(X509_NAME *, char *, int))crypto_sw[6].ptr)
#define X509_get_serialNumber (*(ASN1_INTEGER * (*)(X509 *)) crypto_sw[7].ptr)
#define EVP_get_digestbyname \
(*(const EVP_MD *(*)(const char *))crypto_sw[8].ptr)
#define EVP_Digest \
(*(int (*)( \
const void *, size_t, void *, unsigned int *, const EVP_MD *, void *)) \
crypto_sw[9] \
.ptr)
#define i2d_X509 (*(int (*)(X509 *, unsigned char **))crypto_sw[10].ptr)
#define BN_bn2hex (*(char *(*)(const BIGNUM *a))crypto_sw[11].ptr)
#define ASN1_INTEGER_to_BN \
(*(BIGNUM * (*)(const ASN1_INTEGER *ai, BIGNUM *bn)) crypto_sw[12].ptr)
#define BN_free (*(void (*)(const BIGNUM *a))crypto_sw[13].ptr)
#define CRYPTO_free (*(void (*)(void *addr))crypto_sw[14].ptr)
#define ERR_clear_error (*(void (*)(void))crypto_sw[15].ptr)
#define OPENSSL_free(a) CRYPTO_free(a)
#define OPENSSL_REMOVE_THREAD_STATE()
/* init_ssl_ctx() function updates this array.
* It loads SSL library dynamically and changes NULLs to the actual addresses
* of respective functions. The macros above (like SSL_connect()) are really
* just calling these functions indirectly via the pointer. */
static struct ssl_func ssl_sw[] = {
{"SSL_free", TLS_Mandatory, NULL},
{"SSL_accept", TLS_Mandatory, NULL},
{"SSL_connect", TLS_Mandatory, NULL},
{"SSL_read", TLS_Mandatory, NULL},
{"SSL_write", TLS_Mandatory, NULL},
{"SSL_get_error", TLS_Mandatory, NULL},
{"SSL_set_fd", TLS_Mandatory, NULL},
{"SSL_new", TLS_Mandatory, NULL},
{"SSL_CTX_new", TLS_Mandatory, NULL},
{"TLS_server_method", TLS_Mandatory, NULL},
{"OPENSSL_init_ssl", TLS_Mandatory, NULL},
{"SSL_CTX_use_PrivateKey_file", TLS_Mandatory, NULL},
{"SSL_CTX_use_certificate_file", TLS_Mandatory, NULL},
{"SSL_CTX_set_default_passwd_cb", TLS_Mandatory, NULL},
{"SSL_CTX_free", TLS_Mandatory, NULL},
{"SSL_CTX_use_certificate_chain_file", TLS_Mandatory, NULL},
{"TLS_client_method", TLS_Mandatory, NULL},
{"SSL_pending", TLS_Mandatory, NULL},
{"SSL_CTX_set_verify", TLS_Mandatory, NULL},
{"SSL_shutdown", TLS_Mandatory, NULL},
{"SSL_CTX_load_verify_locations", TLS_Mandatory, NULL},
{"SSL_CTX_set_default_verify_paths", TLS_Mandatory, NULL},
{"SSL_CTX_set_verify_depth", TLS_Mandatory, NULL},
#if defined(OPENSSL_API_3_0)
{"SSL_get1_peer_certificate", TLS_Mandatory, NULL},
#else
{"SSL_get_peer_certificate", TLS_Mandatory, NULL},
#endif
{"SSL_get_version", TLS_Mandatory, NULL},
{"SSL_get_current_cipher", TLS_Mandatory, NULL},
{"SSL_CIPHER_get_name", TLS_Mandatory, NULL},
{"SSL_CTX_check_private_key", TLS_Mandatory, NULL},
{"SSL_CTX_set_session_id_context", TLS_Mandatory, NULL},
{"SSL_CTX_ctrl", TLS_Mandatory, NULL},
{"SSL_CTX_set_cipher_list", TLS_Mandatory, NULL},
{"SSL_CTX_set_options", TLS_Mandatory, NULL},
{"SSL_CTX_set_info_callback", TLS_Mandatory, NULL},
{"SSL_get_ex_data", TLS_Mandatory, NULL},
{"SSL_set_ex_data", TLS_Mandatory, NULL},
{"SSL_CTX_callback_ctrl", TLS_Mandatory, NULL},
{"SSL_get_servername", TLS_Mandatory, NULL},
{"SSL_set_SSL_CTX", TLS_Mandatory, NULL},
{"SSL_ctrl", TLS_Mandatory, NULL},
{"SSL_CTX_set_alpn_protos", TLS_ALPN, NULL},
{"SSL_CTX_set_alpn_select_cb", TLS_ALPN, NULL},
{"SSL_CTX_set_next_protos_advertised_cb", TLS_ALPN, NULL},
{"SSL_CTX_set_timeout", TLS_Mandatory, NULL},
{NULL, TLS_END_OF_LIST, NULL}};
/* Similar array as ssl_sw. These functions could be located in different
* lib. */
static struct ssl_func crypto_sw[] = {
{"ERR_get_error", TLS_Mandatory, NULL},
{"ERR_error_string", TLS_Mandatory, NULL},
{"CONF_modules_unload", TLS_Mandatory, NULL},
{"X509_free", TLS_Mandatory, NULL},
{"X509_get_subject_name", TLS_Mandatory, NULL},
{"X509_get_issuer_name", TLS_Mandatory, NULL},
{"X509_NAME_oneline", TLS_Mandatory, NULL},
{"X509_get_serialNumber", TLS_Mandatory, NULL},
{"EVP_get_digestbyname", TLS_Mandatory, NULL},
{"EVP_Digest", TLS_Mandatory, NULL},
{"i2d_X509", TLS_Mandatory, NULL},
{"BN_bn2hex", TLS_Mandatory, NULL},
{"ASN1_INTEGER_to_BN", TLS_Mandatory, NULL},
{"BN_free", TLS_Mandatory, NULL},
{"CRYPTO_free", TLS_Mandatory, NULL},
{"ERR_clear_error", TLS_Mandatory, NULL},
{NULL, TLS_END_OF_LIST, NULL}};
#endif
#if defined(OPENSSL_API_1_0)
#define SSL_free (*(void (*)(SSL *))ssl_sw[0].ptr)
#define SSL_accept (*(int (*)(SSL *))ssl_sw[1].ptr)
#define SSL_connect (*(int (*)(SSL *))ssl_sw[2].ptr)
#define SSL_read (*(int (*)(SSL *, void *, int))ssl_sw[3].ptr)
#define SSL_write (*(int (*)(SSL *, const void *, int))ssl_sw[4].ptr)
#define SSL_get_error (*(int (*)(SSL *, int))ssl_sw[5].ptr)
#define SSL_set_fd (*(int (*)(SSL *, SOCKET))ssl_sw[6].ptr)
#define SSL_new (*(SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
#define SSL_CTX_new (*(SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
#define SSLv23_server_method (*(SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
#define SSL_library_init (*(int (*)(void))ssl_sw[10].ptr)
#define SSL_CTX_use_PrivateKey_file \
(*(int (*)(SSL_CTX *, const char *, int))ssl_sw[11].ptr)
#define SSL_CTX_use_certificate_file \
(*(int (*)(SSL_CTX *, const char *, int))ssl_sw[12].ptr)
#define SSL_CTX_set_default_passwd_cb \
(*(void (*)(SSL_CTX *, mg_callback_t))ssl_sw[13].ptr)
#define SSL_CTX_free (*(void (*)(SSL_CTX *))ssl_sw[14].ptr)
#define SSL_load_error_strings (*(void (*)(void))ssl_sw[15].ptr)
#define SSL_CTX_use_certificate_chain_file \
(*(int (*)(SSL_CTX *, const char *))ssl_sw[16].ptr)
#define SSLv23_client_method (*(SSL_METHOD * (*)(void)) ssl_sw[17].ptr)
#define SSL_pending (*(int (*)(SSL *))ssl_sw[18].ptr)
#define SSL_CTX_set_verify \
(*(void (*)(SSL_CTX *, \
int, \
int (*verify_callback)(int, X509_STORE_CTX *)))ssl_sw[19] \
.ptr)
#define SSL_shutdown (*(int (*)(SSL *))ssl_sw[20].ptr)
#define SSL_CTX_load_verify_locations \
(*(int (*)(SSL_CTX *, const char *, const char *))ssl_sw[21].ptr)
#define SSL_CTX_set_default_verify_paths (*(int (*)(SSL_CTX *))ssl_sw[22].ptr)
#define SSL_CTX_set_verify_depth (*(void (*)(SSL_CTX *, int))ssl_sw[23].ptr)
#define SSL_get_peer_certificate (*(X509 * (*)(SSL *)) ssl_sw[24].ptr)
#define SSL_get_version (*(const char *(*)(SSL *))ssl_sw[25].ptr)
#define SSL_get_current_cipher (*(SSL_CIPHER * (*)(SSL *)) ssl_sw[26].ptr)
#define SSL_CIPHER_get_name \
(*(const char *(*)(const SSL_CIPHER *))ssl_sw[27].ptr)
#define SSL_CTX_check_private_key (*(int (*)(SSL_CTX *))ssl_sw[28].ptr)
#define SSL_CTX_set_session_id_context \
(*(int (*)(SSL_CTX *, const unsigned char *, unsigned int))ssl_sw[29].ptr)
#define SSL_CTX_ctrl (*(long (*)(SSL_CTX *, int, long, void *))ssl_sw[30].ptr)
#define SSL_CTX_set_cipher_list \
(*(int (*)(SSL_CTX *, const char *))ssl_sw[31].ptr)
#define SSL_CTX_set_info_callback \
(*(void (*)(SSL_CTX *, void (*callback)(const SSL *, int, int)))ssl_sw[32] \
.ptr)
#define SSL_get_ex_data (*(char *(*)(const SSL *, int))ssl_sw[33].ptr)
#define SSL_set_ex_data (*(void (*)(SSL *, int, char *))ssl_sw[34].ptr)
#define SSL_CTX_callback_ctrl \
(*(long (*)(SSL_CTX *, int, void (*)(void)))ssl_sw[35].ptr)
#define SSL_get_servername \
(*(const char *(*)(const SSL *, int type))ssl_sw[36].ptr)
#define SSL_set_SSL_CTX (*(SSL_CTX * (*)(SSL *, SSL_CTX *)) ssl_sw[37].ptr)
#define SSL_ctrl (*(long (*)(SSL *, int, long, void *))ssl_sw[38].ptr)
#define SSL_CTX_set_alpn_protos \
(*(int (*)(SSL_CTX *, const unsigned char *, unsigned))ssl_sw[39].ptr)
typedef int (*tSSL_alpn_select_cb)(SSL *ssl,
const unsigned char **out,
unsigned char *outlen,
const unsigned char *in,
unsigned int inlen,
void *arg);
#define SSL_CTX_set_alpn_select_cb \
(*(void (*)(SSL_CTX *, tSSL_alpn_select_cb, void *))ssl_sw[40].ptr)
typedef int (*tSSL_next_protos_advertised_cb)(SSL *ssl,
const unsigned char **out,
unsigned int *outlen,
void *arg);
#define SSL_CTX_set_next_protos_advertised_cb \
(*(void (*)(SSL_CTX *, tSSL_next_protos_advertised_cb, void *))ssl_sw[41] \
.ptr)
#define SSL_CTX_set_timeout (*(long (*)(SSL_CTX *, long))ssl_sw[42].ptr)
#define SSL_CTX_set_options(ctx, op) \
SSL_CTX_ctrl((ctx), SSL_CTRL_OPTIONS, (op), NULL)
#define SSL_CTX_clear_options(ctx, op) \
SSL_CTX_ctrl((ctx), SSL_CTRL_CLEAR_OPTIONS, (op), NULL)
#define SSL_CTX_set_ecdh_auto(ctx, onoff) \
SSL_CTX_ctrl(ctx, SSL_CTRL_SET_ECDH_AUTO, onoff, NULL)
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB 53
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG 54
#define SSL_CTRL_SET_TLSEXT_HOSTNAME 55
#define SSL_CTX_set_tlsext_servername_callback(ctx, cb) \
SSL_CTX_callback_ctrl(ctx, \
SSL_CTRL_SET_TLSEXT_SERVERNAME_CB, \
(void (*)(void))cb)
#define SSL_set_tlsext_host_name(ctx, arg) \
SSL_ctrl(ctx, SSL_CTRL_SET_TLSEXT_HOSTNAME, 0, (void *)arg)
#define X509_get_notBefore(x) ((x)->cert_info->validity->notBefore)
#define X509_get_notAfter(x) ((x)->cert_info->validity->notAfter)
#define SSL_set_app_data(s, arg) (SSL_set_ex_data(s, 0, (char *)arg))
#define SSL_get_app_data(s) (SSL_get_ex_data(s, 0))
#define SSL_CTX_sess_set_cache_size(ctx, size) SSL_CTX_ctrl(ctx, 42, size, NULL)
#define SSL_CTX_set_session_cache_mode(ctx, mode) \
SSL_CTX_ctrl(ctx, 44, mode, NULL)
#define CRYPTO_num_locks (*(int (*)(void))crypto_sw[0].ptr)
#define CRYPTO_set_locking_callback \
(*(void (*)(void (*)(int, int, const char *, int)))crypto_sw[1].ptr)
#define CRYPTO_set_id_callback \
(*(void (*)(unsigned long (*)(void)))crypto_sw[2].ptr)
#define ERR_get_error (*(unsigned long (*)(void))crypto_sw[3].ptr)
#define ERR_error_string (*(char *(*)(unsigned long, char *))crypto_sw[4].ptr)
#define ERR_remove_state (*(void (*)(unsigned long))crypto_sw[5].ptr)
#define ERR_free_strings (*(void (*)(void))crypto_sw[6].ptr)
#define ENGINE_cleanup (*(void (*)(void))crypto_sw[7].ptr)
#define CONF_modules_unload (*(void (*)(int))crypto_sw[8].ptr)
#define CRYPTO_cleanup_all_ex_data (*(void (*)(void))crypto_sw[9].ptr)
#define EVP_cleanup (*(void (*)(void))crypto_sw[10].ptr)
#define X509_free (*(void (*)(X509 *))crypto_sw[11].ptr)
#define X509_get_subject_name (*(X509_NAME * (*)(X509 *)) crypto_sw[12].ptr)
#define X509_get_issuer_name (*(X509_NAME * (*)(X509 *)) crypto_sw[13].ptr)
#define X509_NAME_oneline \
(*(char *(*)(X509_NAME *, char *, int))crypto_sw[14].ptr)
#define X509_get_serialNumber (*(ASN1_INTEGER * (*)(X509 *)) crypto_sw[15].ptr)
#define i2c_ASN1_INTEGER \
(*(int (*)(ASN1_INTEGER *, unsigned char **))crypto_sw[16].ptr)
#define EVP_get_digestbyname \
(*(const EVP_MD *(*)(const char *))crypto_sw[17].ptr)
#define EVP_Digest \
(*(int (*)( \
const void *, size_t, void *, unsigned int *, const EVP_MD *, void *)) \
crypto_sw[18] \
.ptr)
#define i2d_X509 (*(int (*)(X509 *, unsigned char **))crypto_sw[19].ptr)
#define BN_bn2hex (*(char *(*)(const BIGNUM *a))crypto_sw[20].ptr)
#define ASN1_INTEGER_to_BN \
(*(BIGNUM * (*)(const ASN1_INTEGER *ai, BIGNUM *bn)) crypto_sw[21].ptr)
#define BN_free (*(void (*)(const BIGNUM *a))crypto_sw[22].ptr)
#define CRYPTO_free (*(void (*)(void *addr))crypto_sw[23].ptr)
#define ERR_clear_error (*(void (*)(void))crypto_sw[24].ptr)
#define OPENSSL_free(a) CRYPTO_free(a)
/* use here ERR_remove_state,
* while on some platforms function is not included into library due to
* deprication */
#define OPENSSL_REMOVE_THREAD_STATE() ERR_remove_state(0)
/* init_ssl_ctx() function updates this array.
* It loads SSL library dynamically and changes NULLs to the actual addresses
* of respective functions. The macros above (like SSL_connect()) are really
* just calling these functions indirectly via the pointer. */
static struct ssl_func ssl_sw[] = {
{"SSL_free", TLS_Mandatory, NULL},
{"SSL_accept", TLS_Mandatory, NULL},
{"SSL_connect", TLS_Mandatory, NULL},
{"SSL_read", TLS_Mandatory, NULL},
{"SSL_write", TLS_Mandatory, NULL},
{"SSL_get_error", TLS_Mandatory, NULL},
{"SSL_set_fd", TLS_Mandatory, NULL},
{"SSL_new", TLS_Mandatory, NULL},
{"SSL_CTX_new", TLS_Mandatory, NULL},
{"SSLv23_server_method", TLS_Mandatory, NULL},
{"SSL_library_init", TLS_Mandatory, NULL},
{"SSL_CTX_use_PrivateKey_file", TLS_Mandatory, NULL},
{"SSL_CTX_use_certificate_file", TLS_Mandatory, NULL},
{"SSL_CTX_set_default_passwd_cb", TLS_Mandatory, NULL},
{"SSL_CTX_free", TLS_Mandatory, NULL},
{"SSL_load_error_strings", TLS_Mandatory, NULL},
{"SSL_CTX_use_certificate_chain_file", TLS_Mandatory, NULL},
{"SSLv23_client_method", TLS_Mandatory, NULL},
{"SSL_pending", TLS_Mandatory, NULL},
{"SSL_CTX_set_verify", TLS_Mandatory, NULL},
{"SSL_shutdown", TLS_Mandatory, NULL},
{"SSL_CTX_load_verify_locations", TLS_Mandatory, NULL},
{"SSL_CTX_set_default_verify_paths", TLS_Mandatory, NULL},
{"SSL_CTX_set_verify_depth", TLS_Mandatory, NULL},
{"SSL_get_peer_certificate", TLS_Mandatory, NULL},
{"SSL_get_version", TLS_Mandatory, NULL},
{"SSL_get_current_cipher", TLS_Mandatory, NULL},
{"SSL_CIPHER_get_name", TLS_Mandatory, NULL},
{"SSL_CTX_check_private_key", TLS_Mandatory, NULL},
{"SSL_CTX_set_session_id_context", TLS_Mandatory, NULL},
{"SSL_CTX_ctrl", TLS_Mandatory, NULL},
{"SSL_CTX_set_cipher_list", TLS_Mandatory, NULL},
{"SSL_CTX_set_info_callback", TLS_Mandatory, NULL},
{"SSL_get_ex_data", TLS_Mandatory, NULL},
{"SSL_set_ex_data", TLS_Mandatory, NULL},
{"SSL_CTX_callback_ctrl", TLS_Mandatory, NULL},
{"SSL_get_servername", TLS_Mandatory, NULL},
{"SSL_set_SSL_CTX", TLS_Mandatory, NULL},
{"SSL_ctrl", TLS_Mandatory, NULL},
{"SSL_CTX_set_alpn_protos", TLS_ALPN, NULL},
{"SSL_CTX_set_alpn_select_cb", TLS_ALPN, NULL},
{"SSL_CTX_set_next_protos_advertised_cb", TLS_ALPN, NULL},
{"SSL_CTX_set_timeout", TLS_Mandatory, NULL},
{NULL, TLS_END_OF_LIST, NULL}};
/* Similar array as ssl_sw. These functions could be located in different
* lib. */
static struct ssl_func crypto_sw[] = {
{"CRYPTO_num_locks", TLS_Mandatory, NULL},
{"CRYPTO_set_locking_callback", TLS_Mandatory, NULL},
{"CRYPTO_set_id_callback", TLS_Mandatory, NULL},
{"ERR_get_error", TLS_Mandatory, NULL},
{"ERR_error_string", TLS_Mandatory, NULL},
{"ERR_remove_state", TLS_Mandatory, NULL},
{"ERR_free_strings", TLS_Mandatory, NULL},
{"ENGINE_cleanup", TLS_Mandatory, NULL},
{"CONF_modules_unload", TLS_Mandatory, NULL},
{"CRYPTO_cleanup_all_ex_data", TLS_Mandatory, NULL},
{"EVP_cleanup", TLS_Mandatory, NULL},
{"X509_free", TLS_Mandatory, NULL},
{"X509_get_subject_name", TLS_Mandatory, NULL},
{"X509_get_issuer_name", TLS_Mandatory, NULL},
{"X509_NAME_oneline", TLS_Mandatory, NULL},
{"X509_get_serialNumber", TLS_Mandatory, NULL},
{"i2c_ASN1_INTEGER", TLS_Mandatory, NULL},
{"EVP_get_digestbyname", TLS_Mandatory, NULL},
{"EVP_Digest", TLS_Mandatory, NULL},
{"i2d_X509", TLS_Mandatory, NULL},
{"BN_bn2hex", TLS_Mandatory, NULL},
{"ASN1_INTEGER_to_BN", TLS_Mandatory, NULL},
{"BN_free", TLS_Mandatory, NULL},
{"CRYPTO_free", TLS_Mandatory, NULL},
{"ERR_clear_error", TLS_Mandatory, NULL},
{NULL, TLS_END_OF_LIST, NULL}};
#endif /* OPENSSL_API_1_0 */
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